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The distribution of pigmented cells in the cranial floor and in the inner ear by age group.
| Age | Left inner ear | Left blood vessel | Left optic nerve | Right optic nerve | Right blood vessel | Right inner ear |
|---|---|---|---|---|---|---|
| Young (n = 15) | 15 (100%) | 8 (53%) | 15 (100%) | 15 (100%) | 9 (60%) | 15 (100%) |
| Adult (n = 15) | 14 (93%) | 9 (60%) | 15 (100%) | 14 (93%) | 7 (47%) | 13 (87%) |
| Old (n = 15) | 15 (100%) | 10 (67%) | 13 (87%) | 11 (73%) | 9 (60%) | 15 (100%) |
